.~ Space discharge device (e.g., vacuum tube, etc.)
DEFINITION
Classification: 326/111
Space discharge device (e.g., vacuum tube, etc.):
(under subclass 104) Subject matter including an electronic device having an electrical current flow of charged particles (e.g., ions or electrons) in an area between two spaced electrodes and with at least part of that area being constituted by a gas, vapor, or vacuum.